<template>
    <div class="tab-menu">
        <scroll id="tab-menu">
          <div class="menu-list">
            <div class="menu-list-item"
                 :class="{active: index===currentIndex}"
                 v-for="(item, index) in categories"
                 :key="index"
                 @click="itemClick(index)">
              {{item.title}}
            </div>
          </div>
        </scroll>
    </div>
</template>

<script>
import Scroll from 'components/common/scroll/Scroll'
export default {
  name: 'TabMenu',
  components: {
    Scroll
  },
  props: {
    categories: Array
  },
  data () {
    return {
      currentIndex: 0
    }
  },
  methods: {
    itemClick (index) {
      this.currentIndex = index
      this.$emit('selectItem', index)
    }
  }
}
</script>

<style scoped>
    #tab-menu {
      background-color: #f6f6f6;
      height: 100%;
      width: 100px;
      box-sizing: border-box;
    }

    .menu-list-item {
      height: 45px;
      line-height: 45px;
      text-align: center;
      font-size: 14px;
    }

    .menu-list-item.active {
      font-weight: 700;
      color: var(--color-high-text);
      background-color: #fff;
      border-left: 3px solid var(--color-high-text);
    }
</style>
